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    <title>clGetMemObjectInfo</title>
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    <div class="refentry">
      <a id="id-1"></a>
      <div class="titlepage"></div>
      <div xmlns="" class="refnamediv">
        <a xmlns="http://www.w3.org/1999/xhtml" id="clGetMemObjectInfo"></a>
        <h1>
            clGetMemObjectInfo
        </h1>
        <p>
            Get information that is common to all memory objects (buffer and image objects).
        </p>
      </div>
      <div class="refsynopsisdiv">
        <h2></h2>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
            <tr valign="bottom">
              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a>
                    <strong class="fsfunc">clGetMemObjectInfo</strong>
                (</code>
                <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">memobj</var>
                , </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_info" target="pagedisplay">cl_mem_info</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">param_name</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">param_value_size</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*param_value</var>
                , </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>
                    <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*param_value_size_ret</var>
                <code>)</code></td>
            </tr>
          </table>
        </div>
      </div>
      <div class="refsect1">
        <a id="parameters"></a>
        <h2>Parameters</h2>
        <div class="variablelist">
          <dl class="variablelist">
            <dt>
              <span class="term"> <code class="varname"> memobj </code> </span>
            </dt>
            <dd>
              <p>
                        Specifies the memory object being queried.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> param_name </code> </span>
            </dt>
            <dd>
              <p>
                        Specifies the information to query. The list of supported
                        <code class="varname">param_name</code> types and the
                        information returned in <code class="varname">param_value</code> by
                        <code class="function">clGetMemObjectInfo</code> is described
                        in the table below.
                    </p>
              <div class="informaltable">
                <table class="informaltable" border="1">
                  <colgroup>
                    <col align="left" class="col1" />
                    <col align="left" class="col2" />
                    <col align="left" class="col3" />
                  </colgroup>
                  <thead>
                    <tr>
                      <th align="left">cl_mem_info</th>
                      <th align="left">Return Type</th>
                      <th align="left">Info. returned in <code class="varname">param_value</code></th>
                    </tr>
                  </thead>
                  <tbody>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_TYPE</code>
                      </td>
                      <td align="left">cl_mem_object_type</td>
                      <td align="left">
                                        Returns one of the following values:

                                        <p>
                                          <code class="constant">CL_MEM_OBJECT_BUFFER</code>
                                          if <code class="varname">memobj</code> is created with
                                          <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
                                          or
                                          <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.
                                        </p>

                                        <p>
                                          cl_image_desc.image_type argument value if
                                          <code class="varname">memobj</code> is created with
                                          <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>.
                                        </p>

                                        <p>
                                            <code class="constant">CL_MEM_OBJECT_PIPE</code> if <code class="varname">memobj</code> is 
                                            created with 
                                            <a class="citerefentry" href="clCreatePipe.html"><span class="citerefentry"><span class="refentrytitle">clCreatePipe</span></span></a>.
                                        </p>
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_FLAGS</code>
                      </td>
                      <td align="left">cl_mem_flags</td>
                      <td align="left">
                                      Returns the <code class="varname">flags</code> argument value
                                      specified when <code class="varname">memobj</code> is created with
                                      <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>,
                                      <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>,
                                      <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>.
                                      or
                                      <a class="citerefentry" href="clCreatePipe.html"><span class="citerefentry"><span class="refentrytitle">clCreatePipe</span></span></a>.
                                      If <code class="varname">memobj</code> is a sub-buffer the memory
                                      access qualifiers inherited from parent buffer is also
                                      returned.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_SIZE</code>
                      </td>
                      <td align="left">size_t</td>
                      <td align="left">
                                        Return actual size of the data store associated with 
                                        <code class="varname">memobj</code> in bytes.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_HOST_PTR</code>
                      </td>
                      <td align="left">void *</td>
                      <td align="left">

                                    <p>
                                      If <code class="varname">memobj</code> is created with
                                      <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
                                      or
                                      <a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>
                                      and <code class="constant">CL_MEM_USE_HOST_PTR</code> is
                                      specified in <code class="varname">mem_flags</code>, return the
                                      <code class="varname">host_ptr</code> argument value specified when
                                      <code class="varname">memobj</code> is created. Otherwise a NULL
                                      value is returned.
                                    </p>

                                    <p>
                                      If <code class="varname">memobj</code> is created with
                                      <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>,
                                      return the <code class="varname">host_ptr</code>
                                      + <code class="varname">origin</code> value
                                      specified when <code class="varname">memobj</code>
                                      is created. <code class="varname">host_ptr</code>
                                      is the argument value specified to
                                      <a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
                                      and <code class="constant">CL_MEM_USE_HOST_PTR</code> is specified
                                      in <code class="varname">mem_flags</code> for memory object from
                                      which <code class="varname">memobj</code> is created. Otherwise a
                                      NULL value is returned.
                                    </p> </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_MAP_COUNT</code>
                      </td>
                      <td align="left">cl_uint</td>
                      <td align="left">
                                        Map count. The map count returned should be considered immediately stale. It is
                                        unsuitable for general use in applications. This feature is provided for debugging.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_REFERENCE_COUNT</code>
                      </td>
                      <td align="left">cl_uint</td>
                      <td align="left">
                                        Return <code class="varname">memobj</code> reference count. The reference count returned should
                                        be considered immediately stale. It is unsuitable for general use in
                                        applications. This feature is provided for identifying memory leaks.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_CONTEXT</code>
                      </td>
                      <td align="left">cl_context</td>
                      <td align="left">
                                        Return context specified when memory object is created.
                                        If <code class="varname">memobj</code> is created using
                                        <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>, the context
                                        associated with the memory object specified as the <code class="varname">buffer</code> argument to
                                        <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a> is returned.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_ASSOCIATED_-
MEMOBJECT</code>
                      </td>
                      <td align="left">cl_mem</td>
                      <td align="left">
                                        Return memory object from which <code class="varname">memobj</code> is created.

                                        <p>
                                          This returns the memory object specified
                                          as <code class="varname">buffer</code> argument to
                                          <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>
                                          if <code class="varname">memobj</code> is a subbuffer object created using 
                                          <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.
                                        </p>

                                        <p>
                                            This returns the <code class="varname">memobj</code> specified in 
                                            <span class="type">cl_image_desc</span> if <code class="varname">memobj</code> is an image 
                                            object.
                                        </p>

                                        <p>
                                            Otherwise a NULL value is returned.
                                        </p>
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_OFFSET</code>
                      </td>
                      <td align="left">size_t</td>
                      <td align="left">
                                        Return offset if <code class="varname">memobj</code> is a sub-buffer object created using
                                        <a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.

                                        <p>
                                            This returns 0 if <code class="varname">memobj</code> is not a subbuffer object.
                                        </p>
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_USES_SVM_POINTER</code>
                      </td>
                      <td align="left">cl_bool</td>
                      <td align="left">
                                        Return <code class="constant">CL_TRUE</code> if 
                                        <code class="varname">memobj</code> is a buffer 
                                        object that was created with 
                                        <code class="constant">CL_MEM_USE_HOST_PTR</code> or is a 
                                        subbuffer object of a buffer object that was 
                                        created with <code class="constant">CL_MEM_USE_HOST_PTR</code>
                                        and the <code class="varname">host_ptr</code> specified when the 
                                        buffer object was created is a SVM 
                                        pointer; otherwise returns <code class="constant">CL_FALSE</code>.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_D3D10_RESOURCE_KHR</code>
                      </td>
                      <td align="left">ID3D10Resource *</td>
                      <td align="left">
                                        If the
                                        <a class="citerefentry" href="cl_khr_d3d10_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d10_sharing</span></span></a>
                                        extension is enabled, and if <code class="varname">memobj</code> was created using
                                        <a class="citerefentry" href="clCreateFromD3D10BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10BufferKHR</span></span></a>,
                                        <a class="citerefentry" href="clCreateFromD3D10Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture2DKHR</span></span></a>,
                                        or <a class="citerefentry" href="clCreateFromD3D10Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture3DKHR</span></span></a>,
                                        returns the <code class="varname">resource</code> argument specified
                                        when <code class="varname">memobj</code> was created.
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_DX9_MEDIA_-
ADAPTER_TYPE_KHR</code>
                      </td>
                      <td align="left">cl_dx9_media_-
                                        adapter_type_khr</td>
                      <td align="left">
                                        Returns the <code class="varname">cl_dx9_media_adapter_type_khr</code> argument
                                        value specified when <code class="varname">memobj</code> is created using
                                        <a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
                                        (If the <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
                                        extension is supported)</td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_DX9_MEDIA_-
SURFACE_INFO_KHR</code>
                      </td>
                      <td align="left">cl_dx9_-
                                        surface_info_khr</td>
                      <td align="left">
                                        Returns the <code class="varname">cl_dx9_surface_info_khr</code>
                                        argument value specified when <code class="varname">memobj</code> is created using
                                        <a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
                                        (If the <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
                                        extension is supported)
                                    </td>
                    </tr>
                    <tr>
                      <td align="left">
                        <code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code>
                      </td>
                      <td align="left">ID3D11Resource *</td>
                      <td align="left">If the <a class="citerefentry" href="cl_khr_d3d11_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d11_sharing</span></span></a> 
                                        extension is supported,
                                        if <code class="varname">memobj</code> was created using
                                        <a class="citerefentry" href="clCreateFromD3D11BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11BufferKHR</span></span></a>,
                                        <a class="citerefentry" href="clCreateFromD3D11Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture2DKHR</span></span></a>, or
                                        <a class="citerefentry" href="clCreateFromD3D11Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture3DKHR</span></span></a>,
                                        returns the <code class="varname">resource</code> argument specified when <code class="varname">memobj</code> was created.
                                    </td>
                    </tr>
                  </tbody>
                </table>
              </div>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> param_value </code> </span>
            </dt>
            <dd>
              <p>
                        A pointer to memory where the appropriate result being queried is returned.
                        If <code class="varname">param_value</code> is NULL, it is ignored.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> param_value_size </code> </span>
            </dt>
            <dd>
              <p>
                        Used to specify the size in bytes of memory pointed to by <code class="varname">param_value</code>.
                        This size must be ≥ size of return type as described in the table above.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> param_value_size_ret </code> </span>
            </dt>
            <dd>
              <p>
                        Returns the actual size in bytes of data being queried by <code class="varname">param_value</code>.
                        If <code class="varname">param_value_size_ret</code> is NULL, it is ignored.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
            Returns <span class="errorname">CL_SUCCESS</span> if the function is executed successfully.
            Otherwise, it returns one of the following errors:
        </p>
        <div class="itemizedlist">
          <ul class="itemizedlist" style="list-style-type: disc; ">
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">param_name</code> is not valid, or if size
                in bytes specified by <code class="varname">param_value_size</code> is &lt; the size of return type as
                described in the table above and <code class="varname">param_value</code> is not NULL.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if <code class="varname">memobj</code>
                is a not a valid memory object.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to
                allocate resources required by the
                OpenCL implementation on the device.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to
                allocate resources required by the
                OpenCL implementation on the host.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_D3D10_RESOURCE_KHR</span> If the
              <a class="citerefentry" href="cl_khr_d3d10_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d10_sharing</span></span></a>
              extension is enabled and if <code class="varname">param_name</code>
              is <code class="constant">CL_MEM_D3D10_RESOURCE_KHR</code>
              and <code class="varname">memobj</code> was not created by the function
              <a class="citerefentry" href="clCreateFromD3D10BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10BufferKHR</span></span></a>,
              <a class="citerefentry" href="clCreateFromD3D10Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture2DKHR</span></span></a>,
              or
              <a class="citerefentry" href="clCreateFromD3D10Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture3DKHR</span></span></a>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_DX9_MEDIA_SURFACE_KHR</span>
              if <code class="varname">param_name</code> is
              <code class="constant">CL_MEM_DX9_MEDIA_SURFACE_INFO_KHR</code>
              and  <code class="varname">memobj</code> was not created by the function
              <a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
              from a Direct3D9 surface. (If the
              <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
              extension is supported)
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_D3D11_RESOURCE_KHR</span>
              If the 
              <a class="citerefentry" href="cl_khr_d3d11_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d11_sharing</span></span></a>
              extension is supported, if
              <code class="varname">param_name</code> is <code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code>
              and <code class="varname">memobj</code> was not created by the function
              <a class="citerefentry" href="clCreateFromD3D11BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11BufferKHR</span></span></a>,
              <a class="citerefentry" href="clCreateFromD3D11Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture2DKHR</span></span></a>,
              or
              <a class="citerefentry" href="clCreateFromD3D11Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture3DKHR</span></span></a>."
            </li>
          </ul>
        </div>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />

            <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1.pdf#namedest=clGetMemObjectInfo" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2015 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.
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